<!DOCTYPE html>
<title>Reference for WebVTT rendering, bidi ruby</title>
 <meta charset="UTF-8">
<style>
html { overflow:hidden }
body { margin:0 }
.video {
    display: inline-block;
    width: 320px;
    height: 180px;
    position: relative;
    font-size: 9px;
}
.cue {
    position: absolute;
    bottom: 0;
    right: 0;
    text-align: center;
    unicode-bidi: -webkit-plaintext;
    unicode-bidi: plaintext;
    direction: ltr;
    writing-mode: vertical-rl;
    -webkit-writing-mode: vertical-rl;
}
.cue > span {
    font-family: sans-serif;
    background: rgba(0,0,0,0.8);
    color: white;
}
</style>
<div class="video"><span class="cue"><span><ruby></ruby>に<ruby> 見<rt>み</rt></ruby>えるのは...<br>二行目</span></span></div>
